I worked on an eye tracking project that compared the difference between the way artists and non artists look at images. Very interesting. Non artists tends to dwell on faces, hands and other evidently interesting things. Artists find interest in less obvious thing… odd angular protrusions, unexpected colors etc.

It also showed me how active and (frankly) jittery all human vision is: never resting, scanning. Also... unexpectedly, we seem to evaluate objects according to their features (points, blobs, angles).